Spinning process and apparatus



Oct. 22, 19 35. I o rrz 2,018,565

SPINNING PROCESS AND APPARATUS Original Filed Nov. 2, 1931 ATTORNEY Patented Oct. 22, I935 UNITED STATES PATENT OFFICE SPINNING PROCESS AND APPARATUS Adrianus J. L. Moritz, Enka, N. 0., assignor to American Enka Corporation, Enka, N. 0., a corporation of Delaware This application is a division of my application Serial #572,670, filed November 2, 1931.

The present invention relates to a process and apparatus for rendering the dyeing properties of filaments uniform.

The invention is particularly designed for use in the spinning of artificial silk filaments and the winding of such filaments upon the spool or bobbins.

It has been ascertained that in the ordinary method of spinning according to the spool and roller process wherein thefreshly spun filaments are wound with approximately constant or uniform tension that considerable difference in dyeing properties may be observed between the first and the last layers of the filaments upon. the bobbins. Experiment has shown that these differences are due in large part to the fact that the uppermost, softly stratified layers of filaments, after the washing can shrink considerably duringthedrying, while the lower layers, for the most part lying against the hard core of the spool or roller cannot shrink to the same extent.

It is an object of the invention to overcome this defect to a great extent by increasing the tension upon the filaments as the thickness of a bobbin or spool increases so that the outermost layers of filaments upon a wound spool are wound relatively taut. v

It is a further object of the invention to pro-' vide a simple and easily manufactured article which can be attached to the machine at present in use and which will insure uniform density of the yarn body at the same time, while a considerable uniform braking or initial tension is imparted to the filaments running on the bobbin, and will also increase in a certain predetermined measured degree the winding tension as the spool becomes thicker. Due to this fact it is unnecessary to employ any complicated device to practice the process.

It is also an object of the present invention to make use of the traversing filament guide itself for producing the tension upon the filaments. However, it is obvious that the tension'upon the filaments running upon the spool or bobbin can be increased by means of numerous mechanisms and the following exemplification is designed merely to serve as an example, and is not to be construed in a limiting sense.

With these and other objects in view as,.will become apparent as the description proceeds, the invention consists in the steps and combination 5 Claims.

of elements set forth below and shown in the drawing, in which Figure 1 is a side view of an embodiment of the 'invention, diagrammatically shown,

Figure 2 is a similar illustration of the mechanism shown in Figure 1 when viewed in front thereof, and

Figure 3 is a modified form of traversing mechanism for supporting the thread guide.

In the drawing like reference characters refer to similar parts throughout.

Referring to the drawing, the filament or thread guide 2 is attached in any desired manner to the guide support I. The guide 2 is provided with two friction rods or'friction points 3 and 4 over which the filament .5 is guided in zigzag manner to the spinning spool or bobbin 6.

As is apparent from the showing in Figure 1, due to the position of the brake rods 3 and 4 and the manner in which the filament is guided at an angle about the brake rods and also due tothe position and rotational direction of the spinning spool or bobbin, the angle A will become smaller with the increasing spool winding and thus the tension of the filament running upon the spool or bobbin is accordingly increased.

The traverse mechanism may in this instance be constructed as a slide device as shown in Figure 3.0r as a suspension device as shown in Figures 1 and 2. In addition to the means above described for gradually increasing the tension placed upon the filament rising from the spinning bath 1, the filament between the traverse filament guide and the spinning nozzle 8 can also be tensioned and stretched in any other manner either by a more or less lengthy immersion passage or by additional filament guides which may be positioned within or without the spinning bath 1. It is alsoobvious that filament guide 2 may be positioned as desired whereby different degrees of tension may be imposed upon the filaments.

According to the embodiment of the invention shown in Figures 1 and 2, the last brake rod 4 which is interposed directly before the winding spool or bobbin, is bent to a peculiar hook shape as shown more particularly in Figure 2. Due to the hook shape the filaments in the cross or transverse movement will remain approximately at the same point upon the filament guide member and a properly calculated crossing of the filament may thus be obtained. It is of course, also obvione that the filament guide ,may be, constructed in a variety of forms to accomplish the functions a d results desired as set forth above.

Thus, according to Figure 3 the filament guide maybe attached in a vertical position upon the guide support 9 and this form of the invention is particularly suitable for a slide traverse mechanism in which a large number of horizontally mounted filament guide supports are used.

As above mentioned, it is possible to use many constructional forms of filament guides for securing the results desired, wherein application of the same will successfully facilitate performance of the above described method.

What I claim is:

l. A process for the manufacture of artificial silk having substantially uniform dyeing qualities throughout all parts of a wound package which comprises ejecting a. cellulosic solution from a spinnerette into a spinning bath, tensioning the thus formed filaments by leadingthe same over guides in advance of a collecting device, and

gradually increasing the said tension during the formation of the package to compensate for different degrees of contraction normally occurring which would otherwise causenon-uniformity in the dyeing quality of the filaments in different tension guides in such a manner that the angle of contact of the filaments with the tension guides decreases as the winding proceeds to compensate for variations in the filaments whichwould otherwise cause non-uniformity in the dyeing qualities of the filaments in diflerent parts of the package.

3. A process of manufacturing artificial silk prising ejecting a cellulosic solution from a spinnerette into a spinning bath, passing the newly formed filaments from the bath to a point of collection and there winding the filaments into package form in which there is a relative difference in resistance to contraction between the inner and outer layers thereof, applying tension tothe newly formed filaments during their passage to the point of collection, thereby to stretch the same, and gradually increasing the tension on the filaments as the winding operation progresses.

4. 'A process for the manufacture of artificial silk having substantially uniform dyeing qualities in which the filaments are formed into a package wherein there is a relative difference in resistance to contraction between the inner and outer layers thereof comprising ejecting a cellulosic solution from a spinnerette into a spinning bath, passing the newly formed filaments from the bath to a point of collection and collecting the filaments in package form in which a relative difference in resistance to contraction exists between the inner and outer layer thereof, applying tension to the newly formed filaments during their passage to the point jof collection thereby to stretch the same, and gradually changing the tension on the filaments as the winding operation progresses to effect a gradually increased stretching of the filaments toward the end thereof which is sub-' by when a package is formed and dried it will have substantially uniform. dyeing throughout all parts thereof.

- ADRIANUS J. L. MCiItIIl'Z.

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